Adjustable connected electric lamp and lamp support



I mm,

A. B. STEWAR'? ADJUSTABLE CONNECTED ELECTRIC LAMP AND LAMP SUPPORT FiledSept, 15. 1921 Patented Nov. 24, 1925.

UNITED STATES ANDREW 2B. STEWART,

or CHICAGO, ILLINoIs.

ADJUSTABLE CONNECTED ELECTRIC LAMP AND.-LA.liIP SUPPORT.

Application filed September 15, 1921. Serial No. 500,721.

To all whom it may concern:

Be it known that I, ANDREW B. STEWART,

' a citizen. of Great Britain, residing in Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Adjustable Connected- Electric Lamps and Lamp Supports,of

which the following is a specification.

This invention relates to'that class of adjustable electric lamps andlamp-supports comprising a lamp socket or body provided withadjustablyconnected supporting means adapted to support the lamp bodyin'different adjusted positions with respect to the attached adjustablesupporting means.

The principal object of the invention is to provide a simple, economicaland eflicient adjustable electric lamp and lamp support; and moreparticularly, to provide an improved adjustable electric lamp andconnected lamp support so constructed and adjustably connected as toenable the main bracket or supporting means 'to be detach ably mountedupon any suitable support, and permit the lamp body or socket and bulbto be readily adjusted to any desired angle so as to throw the light inany desired direction with the bracket or support in any position,either horizontal, vertical or inclined, in which it may. happen-to beplaced. I

Other and further objects of the 'inven-' tion will appear from thefollowing description' and claim, and from an inspection of theaccompanying drawings, which are made a part hereof.

The invention consists in the features, combinations, details Ofiiconstruction, and arrangement of parts herein described and claimed. 1

In the accompanying drawings- Figure 1 is a view in side elevation of animproved adjustable electriclamp and connected lamp-supportconstructed'in according the flexible clamping arms of the main bracketmember in horizontal position and in clamping engagement with a supportextending therebetween;

g. 5, is a view in side elevationof the device shown in Figs. 1 to 4inclusive, but showing the opposite side of the device, and showing thelamp socket or lamp body and reflector at a different angle with respectto the attached adjustable supporting means; and Fig. 6, is a view inelevation of the de vice shown in Figs. 1 to 5, inclusive, and showingthe adjustably connected lampsupporting members in another adjustedpos1t1on withrespect to each other and with respect to the lamp socketor lamp body,

bulb, and reflector.

In constructing an improved adjustable electric lamp and connectedlamp-support in accordance with my invention, I provide a lamp socket'or'lamp body member 1, in which terminals 2 and 3 of flexible insulatedelectric light wires 4;and 5, are mounted or supported in the usual orin any desiredordinary and well known manner. The electric wires 4 and 5are of suitable length to enable the lamp and its supporting means to bereadily moved to different locations or positions in which it is to beused, and are;

of course, connected in any ordinary suitable manner with a source ofelectric supply. A cylindrical metallic split sleeve 6 encircles thecylindrical main. body portion of the socket or lamp-body 1, and has apair of laterally projecting flanges, or bosses 7 each formed in oneintegral piece with the corresponding margin or edge of the split sleeve6, and both projecting laterally beyond the periphery of the sleeve inapproximately parallel relation and adjacent to .each other. Theseflanges or bosses 7 are spaced apart; and a metallic bracket arm or linkmember 8 extends between and is .pivotally connected at one end withsaid flanges or bosses 7, andv with the sleeve 6, by means of a pivot orbolt 9 which extends through suitable openings in the flanges or bosses7 and through an opening in the pivoted end of the'arm or link 8. Thepivot 9 shown in the drawings is in the form of a headed screwextehdingthrough the flanges '7 and perforated end of the arm 8 and .111

threaded engagement with athreaded perforated portion of onev of theflanges. ,The screw thus serves to pivotally connect the pivoted arm 8with the flanges 7, and with the sleeve 6, and also serves to secure thesleeve 6 in tight clamping engagement with the socket member 1 encircledby or socket member 6.

The sleeve member 6 of the lamp socket mechanism, is provided with anangular or bayonet slot 10 in each side thereof, and into these slotsextend radial pins 11 which are on and project laterally from oppositesides of the neck of an electric light bulb 12. The bulb is thussupported in operative position by the sleeve 6; and a reflector 13,which surrounds the bulb, has a cylindrical neck 14: which is slidablyand detachably mounted upon and encircles the sleeve 6. The sleeve 6thus supports the reflector as well as the bulb, and also serves as themeans for connecting the arm 8 with the main body or socket member 1 tobe supported in adjustable relation to said arm 8.

The arm 8 is thus pivotally connect-ed at one end with the flangedsleeve 6 and its flanges 7. The arm 8 is provided at its opposite endwith a socket 15 formed between opposed concave or hollowed outsocketforming portions or members 16 and 17 one or both of which may beformed in one integral piece with the main body portion of the arm 8which has forked arms 18 and 19 at its socket-forming end. The forkedarm 18 is flexible and is formed in one inte gral piece with the socketportion 17 And in the form of the device shown in Fig. 2, the arm 18 isalso formed in one integral piece with the main body portion of thesheet metal arm 8, being integrally connected with the latter by meansof an integral web portion 20. One side margin of the metallic webportion 20 is integral with an inclined end portion or flange 21 of theflexible arm 18. And this end portion or flange 21 abuts against theside face of the main body of the arm 8, and serves to hold said sleevethe flexible arm 18 away from or in spaced apart relation to the forkedarm 19, which may also be flexible. The forked arms 18 and 19, whethermade in one integral piece or not, are thus spaced apart at their outerends or extremities and their outer enlarged concave socket-forming endportions 16 and 1? are thus supported in relatively ad justableposition, or in flexibly connected relation to each other. The arms 18and 19 are perforated; and through the perforated portions thereofextends an adjusting or clamping screw 22 having a head 23 in engagementwith the outside of one of the forked arms, for instance, the arm 18,and having a nut 24 in threaded engagement with the opposite threadedend of said screw and in abutting engagement with the outer side of theother one of said arms 18 and 19. The arms 18 and 19 and thesocket-forming portions 16 and 17 at the outer extremities thereof, arethus provided with means for holding them in clamping engagement with aspherical head or ball 23 mounted between and in rotative adjustablerelation to the inner concave faces of the hollow or parti-sphericalsocket-forming. members 16 and 17.

The ball or head 23 is upon and formed in one integral piece with thebody of a pin or bolt 24 having a neck 25 adjacent to the ball member orhead 23 adapted to extend between the socket-forming members 16 and. 17,so as to permit the latter to be rotated in any desired direction uponor around the ball member 23, or enable the ball to be rotated in thesocket in any direction, or the ball may, if desired, be made in aseparate piece and fixed to the body of the bolt or bar 24: in anydesired or suitable manner. The bolt or bar 24, with its head or ballmember 23 thus forms what may be termed the ball member of a ball andsocket joint. A main bracket member 26 comprising, by preference,integral resilient or flexible spring arms 27 which are connected at oneend by means of an integral loop 28, and having opposed clamping jaws 29at the opposite ends of said spring arms and adapted to clamptherebetween any suitable support 29 or 30 which may happen to be'convenient for use as a support for the device, is provided andadjustably connected with the bolt 24- which extends through the loop28, said bolt being provided with a threaded nut 30, in threadedengagement with the threaded end of the bolt, and adapted to clamp theloop portion 28 of the spring bracket arm 26 between said nut and anannular shoulder 31 on the bolt.

The main bracket arm 26, which comprises spring arms 27, 27 isthus-adapted to be detachably mounted upon and secured to any suitablesupport which may be convenient for use. And as such supports may be ofvarious shapes, and may make it necessary that the bracket arm shallextend either hor" izontally, vertically, or at any angle orinclination, according to varying conditions, it is plainly verydesirable that the lamp body or socket, With the bulb and reflectorfixed thereto or supported thereby, should be adjustable with respect tothe main bracket member or lamp support, to as many different positionsand angles as possible, so as to enable the operator to cause the lightto be thrown in any desired direction, and the lamp to be supported inany desired horizontal, vertical, or inclined position, with the mainbracket member in any position in which it may happen to be placed. Andit is plain, from the foregoing description, that the socket arm 8 maybe rotated around the ball member to any desired extent and to anydesired direction, and that the lamp may likewise be rotated to andsupported in any desired position with the arm 8, and with respect tothe adjustably connected bracket members and ball and socket members.

I claim:

In a support for electric lamps, the combination of a lamp-engagingmember, a bracket arm connected with said lamp-engaging member, a socketon said bracket arm, a resilient bracket arm member having a loopportion atone extremity thereof and having resilient arm portionsextending from said 100p and adapted to be detachably secured to asupport, and an intermediate bolt member mounted on and extendingthrough said loop portion of said resilient bracket arm, said bolthaving a head extending into and secured in adjustable relation to andclamped between opposed clamping surfaces of said socket on said pivotedbracket arm. 7

Signed at Chicago, in the county of Cook and State of Illinois, this12th day of September, 1821.

ANDREV B. STEWART.

